Finding the Fourth Proportional to 9,700.29, 13,385.81 and 5,721.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,700.29 : 13,385.81 = 5,721.57 : x
2. Step 2: Convert to fraction form
   9,700.29/13,385.81 = 5,721.57/x
3. Step 3: Cross multiply
   9,700.29x = 13,385.81 × 5,721.57
4. Step 4: Simplify right side
   9,700.29x = 76,587,820.31
5. Step 5: Solve for x
   x = 76,587,820.31/9,700.29
6. Step 6: Final answer
   x = 7,895.42